Honda J35 V6 (J35Z4) Sludge and Cam Scoring

OVERKILL said:
Yes, that's apparent, but you not seeing the point doesn't mean that one doesn't exist. As you already acknowledged, OTR trucks are one application that can benefit from them, so can other applications where downtime is undesirable, like border patrol vehicles, taxis, limos...etc.

Completely depends on the application. The 0W-40 for my SRT is $15/L from the dealer and it holds 7L. Even if I'm running M1 FS 0W-40, that's $76+ tax on sale, so $85.88 for the oil, plus $15 for a filter, so I'm $103-$135 depending on oil and filter choice, and then there's my time, which is worth more than that.

SRT OCI recommendation is contradictory. It says go by the OLM, but then also says "under no circumstances should oil change intervals exceed 6,000 miles (10,000km) or six months, whichever comes first."

My first real OCI was at 11 months and 9,795km (0% on the OLM). So, over by almost double on time, but inside the limit for mileage. I did a UOA on this fill, oil was fit for continued use (HPL Super Car 0W-40). I figure I paid ~$200 including the UOA for this fill, so still less than changing the oil twice.

My following interval was at 16 months and 12,104km (0% on the OLM), so over by more than double on time and outside the limit for mileage. I did not perform a UOA as I felt it was unnecessary. That oil was put in service in September of 2024, it will be changed somewhere between 10 and 17 months I assume, depending on how much I drive this summer. If I manage to get 18 months, that's 3x the interval called for and would justify another UOA. I would have spent $309-$405 on oil changes, plus my time, which bumps that up by more than that again. So, in my case, running HPL even changed at the OLM interval, is cheaper than going by the manual with on sale oil, let alone OE spec.

I grab the sample mid-stream while I change the oil, so there's effectively no time. We have UPS pick-up at the office, so again, not any time, and the shipping is paid for as part of the purchase of the kit, so no additional cost. I take about an hour to do my oil change, taking my time. Doing that when it's convenient for me (and the weather isn't bad) has value, as does my time, as I noted, and my time is worth considerably more than I think the type of oil change you are alluding to.

I run even longer intervals on the RAM, not doing UOA's every time (which is unnecessary) with the HPL "overkill" Super Car 0W-20.
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I don’t think it benefits semis as all. The company would change the oil every 30k, at 10k into that OCI it consumes 1 gal oil. That mean the oil is breaking down. I’m sure the oil is fine, but you’re loosing the add packs and viscosity. On top of that semis idle @1k all night so you have heat or AC. If it were mine, my OCI would be 10k, you might as well bc at that same time the chassis and components need grease. Sure you can stretch out the OCI but when do you want to do your in Frame? 750k or 1.5 million?
 
Bullwinkle007 said:
I don’t think it benefits semis as all. The company would change the oil every 30k, at 10k into that OCI it consumes 1 gal oil. That mean the oil is breaking down. I’m sure the oil is fine, but you’re loosing the add packs and viscosity. On top of that semis idle @1k all night so you have heat or AC. If it were mine, my OCI would be 10k, you might as well bc at that same time the chassis and components need grease. Sure you can stretch out the OCI but when do you want to do your in Frame? 750k or 1.5 million?
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There are plenty of extended drain examples with OTR trucks that differ from your anecdote. Member Doug Hillary, when he was running fleet testing for ExxonMobil, ran Delvac 1 5W-40 in OTR trains through the Australian outback with extended drain intervals and performed random tear-downs. He posted liner and bearing pics (which both measured "as new" at 1.3 million km) on here.

No comment on my personal vehicle examples?
 
Bullwinkle007 said:
Your points are taken. I don’t see a point in long extended OCI. By the time you pay for all the UOA, the time to get the sample,take it to the post office, the cost of mailing it, the cost to do the oil change is less. Time to do an oil change, 30 min. Now no worries about all the wasted time for a UOA and expense
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You’ve been decently calm in standing by your stance of short OCIs, but earlier I’ve already mathematically proven your “costs less for short OCI” point wildly untrue.
 
OVERKILL said:
There are plenty of extended drain examples with OTR trucks that differ from your anecdote. Member Doug Hillary, when he was running fleet testing for ExxonMobil, ran Delvac 1 5W-40 in OTR trains through the Australian outback with extended drain intervals and performed random tear-downs. He posted liner and bearing pics (which both measured "as new" at 1.3 million km) on here.

No comment on my personal vehicle examples?
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1.3…million (!?) km? Is that combined mileage of all of the vehicles or is that the average of each individual vehicle? I’m not sure what the average life expectancy of OTR vehicles is, but that seems really high! I’d be interested in that read. I’ll do a search.
 
OVERKILL said:
There are plenty of extended drain examples with OTR trucks that differ from your anecdote. Member Doug Hillary, when he was running fleet testing for ExxonMobil, ran Delvac 1 5W-40 in OTR trains through the Australian outback with extended drain intervals and performed random tear-downs. He posted liner and bearing pics (which both measured "as new" at 1.3 million km) on here.

No comment on my personal vehicle examples?
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Tug boat operators have done this with Delvac 1 …
 
Panda87 said:
You’ve been decently calm in standing by your stance of short OCIs, but earlier I’ve already mathematically proven your “costs less for short OCI” point wildly untrue.
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Not to mention that fleets with real money on the line are pushing drains farther and farther, and have categorically rejected the "cheap insurance" logic.

It might be "cheap" to someone, but it's not free. And if it's buying insurance against something that won't happen, it's providing no value.

Huge fleets like WalMart, Swift, JB Hunt, etc aren't extending drains haphazardly. They have millions of dollars in machinery at stake.

Yet they do indeed put them "at risk" by extending drains.
 
Panda87 said:
1.3…million (!?) km? Is that combined mileage of all of the vehicles or is that the average of each individual vehicle? I’m not sure what the average life expectancy of OTR vehicles is, but that seems really high! I’d be interested in that read. I’ll do a search.
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These are commercial OTR trucks, and they are built for these mileages. 1.3 M km is not even half its expected lifetime.
 
Pablo said:
No tone there. Man it’s a conversation not a post graduate thesis examination

I always put 5 in ours. 2006 Odyssey. Even did extended runs. Was clean when sold never used oil. Was over 200K don’t remember exact mileage
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I've done 5 in my 2005 Ody also, but I think the book states 4.5. Unless your drain is very low-yield, 5 quarts is perfectly harmless.

It takes a lot more than half a quart to cause any crank-whipping or other harmful issues associated with overfilling.

In reality, the oil level in a running engine varies quite a bit with temperature and viscosity grades. If you run thicker oils or have lower typical temp (extremely short trips all the time) then you can probably run even more overfill without any issues whatsoever.
 
Panda87 said:
1.3…million (!?) km? Is that combined mileage of all of the vehicles or is that the average of each individual vehicle? I’m not sure what the average life expectancy of OTR vehicles is, but that seems really high! I’d be interested in that read. I’ll do a search.
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That was a single vehicle, I don't think that kind of mileage is uncommon with OTR trucks, but to have the parts measure "as new" at that mileage was certainly impressive.
 
The Critic said:
Only the newer GDI ones. Older ones were 4.5 qt.
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For my 05 Ody:
1745249468974.webp
 
OVERKILL said:
That was a single vehicle, I don't think that kind of mileage is uncommon with OTR trucks, but to have the parts measure "as new" at that mileage was certainly impressive.
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It helps that road trains often don't spend much time idling, I'm told they have multiple drivers rotating to keep things moving.

The habit of US OTR truckers of long idling is really a huge negative on the engines that doesn't get nearly enough emphasis.
 
Had the same thing happen on an Odyssey of mine. IMO a manufacturing defect. Decent quality oil and filters... usually 5W30. I generally changed at 5k miles and never more than the MM interval.

At the time, the camshafts were not available and the first five engines I looked at at the junkyard also showed the same wear.

I also owned a 2005 Odyssey (non-VCM) with the same mileage and it didn't show this wear although it was also dark under the valve cover.
 
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